A method of using a magnetic coupler for a cable drum

Abstract

The application relates to a magnetic coupler for a cable reel, comprising: a conductor cylinder, a plurality of grooves are arranged on the inner circumferential side wall of the conductor cylinder in a circumferential direction, and the conductor cylinder is used for connecting a driving mechanism for driving the conductor cylinder to rotate; a permanent magnet cylinder, the permanent magnet cylinder is located in the interior of the conductor cylinder, an air gap is arranged between the permanent magnet cylinder and the conductor cylinder, the permanent magnet cylinder and the conductor cylinder can rotate relative to each other, the permanent magnet cylinder can be connected to the cable reel, and the permanent magnet cylinder comprises a plurality of permanent magnets arranged in an annular array, and the permanent magnets can correspond to the grooves one by one. The application also provides a use method of the magnetic coupler for the cable reel. The magnetic coupler can realize cable winding and unwinding of the cable reel, can keep the cable tensioned during the cable winding, the cable unwinding and the stopping of the cable winding, and can avoid the situation that the cable is damaged due to friction with the ground and the situation that the cable is broken when the cable is wound again after the cable is stopped from being unwound and is hooked by ground sundries.

Description

Technical Field

[0001] This invention relates to the field of cable reel technology, and more particularly to a method of using a magnetic coupler for cable reels. Background Technology

[0002] A cable reel is a cable winding device that provides power, control power, or control signals to lifting equipment and bulk material transport equipment. A coupler used with a cable reel connects to the cable reel and drives it to wind or unwind the cable.

[0003] During assembly, the coupler and cable reel are mounted on mobile equipment such as lifting equipment or bulk material transport equipment, with the end of the cable on the reel connected to the power supply equipment. When the mobile equipment moves the coupler and cable reel closer to the power supply equipment, the coupler drives the cable drum to rotate in a first direction to reel in the cable. When the mobile equipment moves the coupler and cable reel away from the power supply equipment, the coupler drives the cable drum to rotate in the opposite direction to unload the cable.

[0004] However, with existing couplers, when the mobile device stops moving, the cable continues to descend and elongate under its own weight. The cable between the cable reel and the power supply equipment forms a downward-convex arc until it contacts the ground and stops descending and elongating due to friction. During this process, the cable is prone to wear. Furthermore, when the coupler drives the cable reel to rotate again to reel in the cable, it is easily hooked by debris such as iron rods on the ground, leading to breakage during the reel-in process. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a method for using a magnetic coupler for cable reels, which solves the technical problems of existing couplers where the cable continues to descend and extend to contact the ground and cause wear when the mobile device stops moving, and the technical problems of the cable being easily hooked by interfering debris such as iron rods on the ground when the coupler drives the cable reel to rotate again to reel in the cable, resulting in the cable breaking during cable reeling.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0009] In a first aspect, embodiments of the present invention provide a magnetic coupler for a cable reel, comprising:

[0010] A conductor cylinder, wherein a plurality of grooves are provided at circumferential intervals on the inner circumferential sidewall of the conductor cylinder, and the conductor cylinder is used to connect a drive mechanism that drives the conductor cylinder to rotate.

[0011] A permanent magnet cylinder is located inside the conductor cylinder. An air gap is provided between the permanent magnet cylinder and the conductor cylinder. The permanent magnet cylinder and the conductor cylinder can rotate relative to each other. The permanent magnet cylinder can be connected to a cable reel. The permanent magnet cylinder includes a plurality of permanent magnets arranged in a ring array. The permanent magnets can correspond one-to-one with the grooves.

[0012] According to the present invention, the permanent magnet cylinder includes a permanent magnet retaining ring, and a plurality of permanent magnets are disposed on the outer peripheral surface of the permanent magnet retaining ring, wherein the magnetism of two adjacent permanent magnets is opposite.

[0013] According to the present invention, the permanent magnet cylinder further includes a plurality of pressing blocks, the plurality of pressing blocks being arranged at intervals along the circumference of the permanent magnet retaining ring, and the pressing blocks being fixedly connected to the permanent magnet retaining ring. The pressing blocks and the permanent magnets are arranged alternately, and two adjacent pressing blocks can press the permanent magnets between them against the permanent magnet retaining ring.

[0014] According to the present invention, the pressing block and the permanent magnet are adapted trapezoids.

[0015] According to the present invention, the permanent magnet cylinder further includes a permanent magnet end cap, which is fixedly connected to the first end face of the permanent magnet retaining ring.

[0016] A permanent magnet flange is provided on the second end face of the permanent magnet retaining ring.

[0017] According to the present invention, it further includes a plurality of heat sinks, which are arranged at intervals along the circumferential direction of the conductor cylinder on the outer circumferential surface of the conductor cylinder.

[0018] According to the present invention, a retaining ring is also included, the retaining ring being fixedly connected to the first end of the conductor cylinder.

[0019] According to the present invention, a conductor flange is provided at the second end of the conductor cylinder.

[0020] According to the present invention, it further includes:

[0021] Multiple radial positioning screws, which are capable of extending through the conductor cylinder in the radial direction and pressing against the outer circumferential surface of the permanent magnet cylinder;

[0022] Multiple axial positioning screws are provided, which can extend through the conductor cylinder along the axial direction and press against the end face of the permanent magnet cylinder.

[0023] Secondly, the present invention also provides a method of using a magnetic coupler for cable reels:

[0024] When reeling in the cable, the drive mechanism is in operation, and its usage steps are as follows:

[0025] A1: The driving mechanism drives the conductor cylinder to rotate in the first direction. The conductor cylinder rotates relative to the permanent magnet cylinder. The eddy current between the conductor cylinder and the permanent magnet cylinder forms a torque acting on the permanent magnet cylinder. The torque drives the permanent magnet cylinder to rotate in the first direction. The permanent magnet cylinder drives the cable reel to rotate in the same direction to reel in the cable.

[0026] When the cable is being laid out, the drive mechanism is in operation, and its usage steps are as follows:

[0027] B1: Same as step A1;

[0028] B2: When the cable unwinding tension on the cable reel is greater than the cable winding tension applied by the cable reel to the cable, the cable unwinds and drives the cable reel to rotate in the opposite direction of the first direction. The cable reel drives the permanent magnet cylinder to rotate in the same direction. Eddy currents between the permanent magnet cylinder rotating in the opposite direction of the first direction and the conductor cylinder rotating in the first direction generate a braking torque acting on the permanent magnet cylinder. The direction of the braking torque is the first direction. The permanent magnet cylinder transmits the braking torque to the cable reel and applies a winding tension to the cable through the cable reel, thereby making the cable taut during the unwinding process.

[0029] When the cable is stopped from being wound up or unwound, the drive mechanism is in a de-energized state, and its operation steps are as follows:

[0030] C1: The cable is unloaded due to its own weight, which drives the cable reel to rotate in the opposite direction of the first direction. The cable reel drives the permanent magnet cylinder to rotate in the same direction. The permanent magnet cylinder rotates relative to the conductor cylinder. Eddy currents between the permanent magnet cylinder and the conductor cylinder form resistance acting on the permanent magnet cylinder. The direction of the resistance is the first direction. The resistance causes the rotation speed of the permanent magnet cylinder to gradually decrease. The permanent magnet cylinder drives the cable unloading speed of the cable to gradually decrease through the cable reel.

[0031] As the rotational speed difference between the permanent magnet cylinder and the conductor cylinder gradually decreases, the resistance acting on the permanent magnet cylinder formed by the eddy currents between the permanent magnet cylinder and the conductor cylinder also gradually decreases.

[0032] C2: When the permanent magnet on the permanent magnet cylinder rotates to the groove corresponding to the groove on the conductor cylinder, the eddy current between the permanent magnet and the groove changes abruptly, thereby increasing the resistance acting on the permanent magnet cylinder. The direction of the resistance is a first direction. The permanent magnet cylinder transmits the resistance to the cable through the cable reel to form a cable pulling force. The cable pulling force can resist the cable's own weight and prevent the cable from continuing to be released, and make the cable taut.

[0033] (III) Beneficial Effects

[0034] The beneficial effects of the present invention are: the present invention provides a magnetic coupler for cable reels, comprising a conductor cylinder and a permanent magnet cylinder.

[0035] The inner circumferential sidewall of the conductor cylinder has multiple grooves spaced circumferentially, and the conductor cylinder can be connected to a drive mechanism for driving the conductor cylinder to rotate. A permanent magnet cylinder is located inside the conductor cylinder, with an air gap between them. The permanent magnet cylinder can rotate relative to the conductor cylinder and can be connected to a cable reel. The permanent magnet cylinder includes multiple permanent magnets arranged in a ring array, with each permanent magnet corresponding to one of the grooves.

[0036] The magnetic coupler for cable reels of this application is mounted on a mobile device, and the end of the cable wound on the cable reel is connected to a power supply device.

[0037] The method of using the magnetic coupler for cable reels in this application is as follows:

[0038] When the mobile device drives the magnetic coupler and cable reel to move synchronously towards the power supply equipment, the cable needs to be wound up. At this time, the drive mechanism is in operation, and its operation steps are as follows:

[0039] A1: The drive mechanism drives the conductor cylinder to rotate in the first direction. The conductor cylinder rotates relative to the permanent magnet cylinder. Eddy currents are generated between the conductor cylinder and the permanent magnet cylinder. The induced magnetic field generated by the eddy currents forms a torque acting on the permanent magnet cylinder. The torque drives the permanent magnet cylinder to rotate in the first direction. The permanent magnet cylinder drives the cable reel to rotate in the same direction to reel in the cable.

[0040] When the mobile device moves the magnetic coupler and cable reel away from the power supply equipment, the cable needs to be unloaded. At this time, the drive mechanism is in operation. The specific usage steps are as follows:

[0041] B1: Same as step A1.

[0042] B2: Since the cable ends are connected to power supply equipment, when the cable reel moves away from the power supply equipment, the power supply equipment applies a cable release force to the cable on the reel. When the cable release force on the cable on the reel is greater than the cable take-up force applied by the reel, the cable is released and the cable reel rotates in the opposite direction of the first direction. The cable reel drives the permanent magnet cylinder to rotate in the same direction. The permanent magnet cylinder rotating in the opposite direction of the first direction and the conductor cylinder rotating in the first direction rotate relative to each other and form eddy currents between them. According to Lenz's law, these eddy currents can generate an induced magnetic field that acts on the permanent magnet cylinder with a braking torque in the first direction. The permanent magnet cylinder transmits the braking torque to the cable reel and applies a cable take-up force to the cable through the cable reel. Therefore, during the cable release process, both ends of the cable are subjected to the cable release force applied by the power supply equipment and the cable take-up force applied by the cable reel, but the cable release force is greater than the cable take-up force, thus keeping the cable taut during the release process and preventing the cable from contacting the ground and causing wear.

[0043] When the cable is stopped being wound up or unwound, the drive mechanism is de-energized. At this time, both the conductor cylinder and the permanent magnet cylinder stop rotating. The operating steps are as follows:

[0044] C1: Due to its own weight, the cable is unloaded, causing the cable reel to rotate in the opposite direction of the first direction. The cable reel then causes the permanent magnet cylinder to rotate in the same direction. The permanent magnet cylinder rotates relative to the conductor cylinder, creating eddy currents between them. These eddy currents generate an induced magnetic field, which forms a resistance acting on the permanent magnet cylinder. This resistance hinders the rotation of the permanent magnet cylinder, and its direction is the first direction. This resistance causes the rotational speed of the permanent magnet cylinder to gradually decrease, and the cable unloading speed, driven by the cable reel, gradually decreases.

[0045] As the cable reel speed decreases, the rotational speed difference between the permanent magnet cylinder and the conductor cylinder gradually decreases, and the resistance acting on the permanent magnet cylinder caused by the eddy currents between the permanent magnet cylinder and the conductor cylinder also gradually decreases.

[0046] C2: When the permanent magnet on the permanent magnet cylinder rotates to the groove corresponding to the conductor cylinder, the eddy current between the permanent magnet and the groove undergoes a sudden change, increasing the resistance acting on the permanent magnet cylinder. The direction of this resistance is the first direction. The permanent magnet cylinder transmits the resistance to the cable through the cable reel to form a cable pulling force. This pulling force can resist the cable's own weight and prevent the cable from continuing to be released, thus keeping the cable taut. This avoids the cable from continuing to descend and elongate into a downward-convex arc under its own weight until it contacts the ground and stops releasing under friction, which would lead to cable wear. It also avoids the situation where, when the magnetic coupler for the cable reel of this application drives the cable reel to rotate again to retrieve the cable, the cable is easily hooked by interfering debris such as iron rods on the ground, causing the cable to break during retrieval. Even if the eddy current surge generated when the permanent magnet on the permanent magnet cylinder first rotates to the groove corresponding to the conductor cylinder is insufficient to overcome the resistance of the permanent magnet cylinder itself and the cable continues to be laid out, the multiple eddy current surges generated when the permanent magnet rotates to the groove corresponding to the conductor cylinder for the second or subsequent times will balance the cable's own weight with the multiple cable-reeling forces transmitted from the permanent magnet cylinder and the cable cylinder to the cable and hinder the cable laying out.

[0047] As can be seen from the above, the conductor cylinder and the permanent magnet cylinder of the magnetic coupler for cable reels of this application have no contact, thus eliminating frictional loss and resulting in a longer service life. Furthermore, there is no need to inject lubricating oil between the conductor cylinder and the permanent magnet cylinder, making it convenient to use. Moreover, the drive mechanism of the magnetic coupler for cable reels is de-energized when cable winding or unwinding is stopped, resulting in low energy consumption. Additionally, the magnetic coupler for cable reels of this application has a simple structure and is easy to manufacture. Attached Figure Description

[0048] Figure 1 This is a three-dimensional schematic diagram of the magnetic coupler for cable reels according to the present invention;

[0049] Figure 2 for Figure 1 A sectional view;

[0050] Figure 3 for Figure 1 A schematic diagram of the decomposition process;

[0051] Figure 4 This is a three-dimensional schematic diagram of the conductor cylinder;

[0052] Figure 5 This is a three-dimensional schematic diagram of the permanent magnet cylinder;

[0053] Figure 6 This is a schematic diagram showing the relative relationship between the conductor cylinder and the permanent magnet cylinder.

[0054] [Explanation of Labels in the Attached Image]

[0055] 1: Conductor cylinder; 11: Groove; 12: Conductor flange;

[0056] 2: Permanent magnet cylinder; 21: Permanent magnet retaining ring; 211: Permanent magnet flange; 22: Permanent magnet; 23: Pressure block; 24: Permanent magnet end cap;

[0057] 3: Heat sink;

[0058] 4: Retaining ring;

[0059] 5: Radial positioning screws;

[0060] 6: Axial positioning screws. Detailed Implementation

[0061] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0062] See Figure 1-6 The magnetic coupler for cable reels proposed in this embodiment of the invention is installed on a mobile device. The magnetic coupler for cable reels includes a conductor cylinder 1 and a permanent magnet cylinder 2.

[0063] The inner circumferential sidewall of the conductor cylinder 1 is provided with multiple grooves 11 spaced apart circumferentially. The conductor cylinder 1 is used to connect a drive mechanism that drives the conductor cylinder 1 to rotate. The permanent magnet cylinder 2 is located inside the conductor cylinder 1, and an air gap is provided between the permanent magnet cylinder 2 and the conductor cylinder 1. The permanent magnet cylinder 2 and the conductor cylinder 1 can rotate relative to each other. The permanent magnet cylinder 2 can be connected to a cable reel. The permanent magnet cylinder 2 includes multiple permanent magnets 22 arranged in a ring array, and each permanent magnet 22 corresponds one-to-one with a groove 11. A cable is wound on the cable reel, and the end of the cable is connected to a power supply device, the position of which is fixed.

[0064] Furthermore, the method of using the magnetic coupler for cable reels in this application is as follows:

[0065] When the mobile device drives the magnetic coupler and cable reel to move synchronously towards the power supply equipment, the cable needs to be wound up. At this time, the drive mechanism is in operation, and its operation steps are as follows:

[0066] A1: The driving mechanism drives the conductor cylinder 1 to rotate in the first direction. The conductor cylinder 1 rotates relative to the permanent magnet cylinder 2. Eddy currents are generated between the conductor cylinder 1 and the permanent magnet cylinder 2. The induced magnetic field generated by the eddy currents forms a torque acting on the permanent magnet cylinder 2. The torque drives the permanent magnet cylinder 2 to rotate in the first direction. The permanent magnet cylinder 2 drives the cable reel to rotate in the same direction to reel in the cable.

[0067] When the mobile device moves the magnetic coupler and cable reel away from the power supply equipment, the cable needs to be unloaded. At this time, the drive mechanism is in operation. The specific usage steps are as follows:

[0068] B1: Same as step A1.

[0069] B2: Since the cable end is connected to the power supply equipment, when the cable reel moves away from the power supply equipment, the power supply equipment applies a cable unloading force to the cable on the cable reel. When the cable unloading force on the cable on the cable reel is greater than the cable winding force applied by the cable reel to the cable, the cable is unloaded and drives the cable reel to rotate in the opposite direction of the first direction. The cable reel drives the permanent magnet cylinder 2 to rotate in the same direction. The permanent magnet cylinder 2, rotating in the opposite direction of the first direction, and the conductor cylinder 1, rotating in the first direction, rotate relative to each other and form eddy currents between them. According to Lenz's law, these eddy currents can generate an induced magnetic field that acts on the permanent magnet cylinder 2 with a braking torque in the first direction. The permanent magnet cylinder 2 transmits the braking torque to the cable reel and applies a cable winding force to the cable through the cable reel. Therefore, during the cable laying process, both ends of the cable are subjected to the laying tension applied by the power supply equipment and the winding tension applied by the cable reel, respectively. However, the laying tension is greater than the winding tension, which in turn keeps the cable taut during the laying process and prevents the cable from contacting the ground and causing wear.

[0070] When the cable is stopped from being wound up or unwound, the drive mechanism is de-energized. At this time, both the conductor cylinder 1 and the permanent magnet cylinder 2 stop rotating. The operating steps are as follows:

[0071] C1: Due to its own weight, the cable is unloaded, causing the cable reel to rotate in the opposite direction of the first direction. The cable reel then causes the permanent magnet cylinder to rotate in the same direction. The permanent magnet cylinder rotates relative to the conductor cylinder, creating eddy currents between the permanent magnet cylinder 2 and the conductor cylinder 1. These eddy currents generate an induced magnetic field between them, which forms a resistance acting on the permanent magnet cylinder 2. This resistance hinders the rotation of the permanent magnet cylinder 2, and the direction of this resistance is the first direction. This resistance causes the rotational speed of the permanent magnet cylinder 2 to gradually decrease, and the cable unloading speed driven by the cable reel gradually decreases.

[0072] As the cable reel speed decreases, the rotational speed difference between the permanent magnet cylinder 2 and the conductor cylinder 1 gradually decreases, and the resistance generated by the eddy currents between the permanent magnet cylinder 2 and the conductor cylinder 1 on the permanent magnet cylinder 2 also gradually decreases.

[0073] C2: When the permanent magnet 22 on the permanent magnet cylinder 2 rotates to the groove 11 corresponding to the conductor cylinder 1, the eddy current between the permanent magnet 22 and the groove 11 undergoes a sudden change, increasing the resistance acting on the permanent magnet cylinder 2. The direction of this resistance is the first direction. The permanent magnet cylinder 2 transmits the resistance to the cable through the cable reel to form a cable pulling force. This cable pulling force can resist the cable's own weight and prevent the cable from continuing to be released, thus keeping the cable taut. This avoids the cable from continuing to descend and elongate into a downward-convex arc under its own weight until the cable contacts the ground and stops being released under friction, which would cause cable wear. It also avoids the situation where, when the magnetic coupler for the cable reel of this application drives the cable reel to rotate again to retrieve the cable, the cable is easily hooked by interfering debris such as iron rods on the ground, causing the cable to break during retrieval. Even if the eddy current mutation generated when the permanent magnet 22 on the permanent magnet cylinder 2 rotates to the groove 11 on the conductor cylinder 1 for the first time does not provide enough resistance to the cable's own weight, and the cable continues to be released, the multiple eddy current mutations generated when the permanent magnet 22 rotates to the groove 11 on the conductor cylinder 1 for the second or subsequent times will balance the cable's own weight with the multiple cable winding forces transmitted to the cable by the permanent magnet cylinder 2 and the cable reel, thus hindering the cable release.

[0074] As can be seen from the above, in the magnetic coupler for cable reels of this application, there is no contact between the conductor cylinder 1 and the permanent magnet cylinder 2, resulting in no frictional loss, a longer service life, and no need to inject lubricating oil between the conductor cylinder 1 and the permanent magnet cylinder 2, making it convenient to use. Furthermore, when the cable is stopped from being wound up or unwound, the drive mechanism of the magnetic coupler for cable reels is in a de-energized state, resulting in low energy consumption. At the same time, the magnetic coupler for cable reels of this application has a simple structure and is easy to manufacture.

[0075] Furthermore, the drive mechanism is a motor or a speed reducer.

[0076] Furthermore, the permanent magnet cylinder 2 includes a permanent magnet retaining ring 21, and a plurality of permanent magnets 22 are disposed on the outer circumferential surface of the permanent magnet retaining ring 21. The magnetic properties of two adjacent permanent magnets 22 are opposite, or the plurality of permanent magnets 22 are arranged in a Heilbeck array.

[0077] Furthermore, the permanent magnet cylinder 2 also includes multiple pressure blocks 23, which are spaced apart circumferentially along the permanent magnet retaining ring 21 and are fixedly connected to the permanent magnet retaining ring 21. The pressure blocks 23 and the permanent magnets 22 are staggered, and adjacent pressure blocks 23 can press the permanent magnets 22 between them against the permanent magnet retaining ring 21. Preferably, the pressure blocks 23 are detachably fixed to the permanent magnet retaining ring 21 by bolts.

[0078] Specifically, the pressure block 23 and the permanent magnet 22 are adapted trapezoids so that two adjacent pressure blocks 23 can press the permanent magnet 22 between them against the permanent magnet retaining ring 21.

[0079] Furthermore, the permanent magnet cylinder 2 also includes a permanent magnet end cap 24, which is fixedly connected to the first end face of the permanent magnet retaining ring 21. The permanent magnet end cap 24 can prevent the magnetic lines of force between the permanent magnet cylinder 2 and the conductor cylinder 1 from escaping from the first end face of the permanent magnet retaining ring 21, thereby improving the magnetic field strength between the permanent magnet cylinder 2 and the conductor cylinder 1.

[0080] Furthermore, a permanent magnet flange 211 is provided on the second end face of the permanent magnet retaining ring 21, and the permanent magnet retaining ring 21 is connected to the cable reel through the permanent magnet flange 211.

[0081] Furthermore, the magnetic coupler for the cable reel also includes multiple heat sinks 3, which are spaced apart circumferentially on the outer circumferential surface of the conductor cylinder 1. The heat sinks 3 are used to dissipate the heat generated when the conductor cylinder 1 and the permanent magnet cylinder 2 rotate relative to each other. The heat sinks 3 are detachably mounted on the conductor cylinder 1 by bolts, or the heat sinks 3 and the conductor cylinder 1 are an integral structure.

[0082] Furthermore, the magnetic coupler used for the cable reel also includes a retaining ring 4, which is fixedly connected to the first end of the conductor cylinder 1. The retaining ring 4 is used to prevent external debris from entering between the conductor cylinder 1 and the permanent magnet cylinder 2.

[0083] Furthermore, a conductor flange 12 is provided at the second end of the conductor cylinder 1, and the conductor cylinder 1 is connected to the drive mechanism through the conductor flange 12.

[0084] It should be noted that the material of the conductor cylinder 1 can be adjusted according to different requirements for the speed of cable winding or unwinding, so as to change the magnetic field strength between the conductor cylinder 1 and the permanent magnet cylinder 2 when they rotate relative to each other, thereby changing the rotational speed of the permanent magnet cylinder 2. Preferably, the material of the conductor cylinder 1 is copper, copper alloy, aluminum, or aluminum alloy.

[0085] Furthermore, the magnetic coupler used for the cable reel also includes multiple radial positioning screws 5 and multiple axial positioning screws 6.

[0086] The radial positioning screw 5 extends radially through the conductor cylinder 1 and presses against the outer circumferential surface of the permanent magnet cylinder 2. The axial positioning screw 6 extends axially through the conductor cylinder 1 and presses against the end face of the permanent magnet cylinder 2.

[0087] When the magnetic coupler for cable reels of this application is not assembled with the mobile equipment and the cable reel, the relative position between the conductor cylinder 1 and the permanent magnet cylinder 2 is first defined by the radial positioning screw 5 and the axial positioning screw 6 to ensure that the air gap between the conductor cylinder 1 and the permanent magnet cylinder 2 remains unchanged during transportation. After the magnetic coupler for cable reels of this application is assembled with the mobile equipment and the cable reel, the radial positioning screw 5 and the axial positioning screw 6 are removed.

[0088] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0089] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method of using a magnetic coupler for cable reels, characterized in that, Magnetic couplers for cable reels include: Conductor cylinder (1), the inner circumferential sidewall of the conductor cylinder (1) is provided with a plurality of grooves (11) spaced apart along the circumferential direction, the conductor cylinder (1) is used to connect a drive mechanism that drives the conductor cylinder (1) to rotate. A permanent magnet cylinder (2) is located inside the conductor cylinder (1). An air gap is provided between the permanent magnet cylinder (2) and the conductor cylinder (1). The permanent magnet cylinder (2) and the conductor cylinder (1) can rotate relative to each other. The permanent magnet cylinder (2) can be connected to a cable reel. The permanent magnet cylinder (2) includes a plurality of permanent magnets (22) arranged in a ring array. The permanent magnets (22) can correspond one-to-one with the grooves (11). The permanent magnet cylinder (2) includes a permanent magnet retaining ring (21), and a plurality of permanent magnets (22) are disposed on the outer peripheral surface of the permanent magnet retaining ring (21), with adjacent permanent magnets (22) having opposite magnetic properties; The permanent magnet cylinder (2) also includes a plurality of pressure blocks (23), which are arranged at intervals along the circumference of the permanent magnet retaining ring (21), and the pressure blocks (23) are fixedly connected to the permanent magnet retaining ring (21). The pressure blocks (23) and the permanent magnets (22) are arranged alternately, and two adjacent pressure blocks (23) can press the permanent magnets (22) between them against the permanent magnet retaining ring (21). When reeling in the cable, the drive mechanism is in operation, and its usage steps are as follows: A1: The driving mechanism drives the conductor cylinder (1) to rotate in the first direction. The conductor cylinder (1) rotates relative to the permanent magnet cylinder (2). The eddy current between the conductor cylinder (1) and the permanent magnet cylinder (2) forms a torque acting on the permanent magnet cylinder (2). The torque drives the permanent magnet cylinder (2) to rotate in the first direction. The permanent magnet cylinder (2) drives the cable reel to rotate in the same direction to reel in the cable. When the cable is being laid out, the drive mechanism is in operation, and its usage steps are as follows: B1: Same as step A1; B2: When the cable unwinding force on the cable reel is greater than the cable winding force applied by the cable reel to the cable, the cable unwinds and drives the cable reel to rotate in the opposite direction of the first direction. The cable reel drives the permanent magnet cylinder (2) to rotate in the same direction. The eddy current between the permanent magnet cylinder (2) rotating in the opposite direction of the first direction and the conductor cylinder (1) rotating in the first direction forms a braking torque acting on the permanent magnet cylinder (2). The direction of the braking torque is the first direction. The permanent magnet cylinder (2) transmits the braking torque to the cable reel and applies a winding force to the cable through the cable reel, thereby making the cable taut during the unwinding process. When the cable is stopped from being wound up or unwound, the drive mechanism is in a de-energized state, and its operation steps are as follows: C1: The cable is unloaded due to its own weight, which drives the cable reel to rotate in the opposite direction of the first direction. The cable reel drives the permanent magnet cylinder (2) to rotate in the same direction. The permanent magnet cylinder (2) rotates relative to the conductor cylinder (1). Eddy currents between the permanent magnet cylinder (2) and the conductor cylinder (1) form resistance on the permanent magnet cylinder (2). The direction of the resistance is the first direction. The resistance causes the rotation speed of the permanent magnet cylinder (2) to gradually decrease. The permanent magnet cylinder (2) drives the cable unloading speed of the cable to gradually decrease through the cable reel. As the rotational speed difference between the permanent magnet cylinder (2) and the conductor cylinder (1) gradually decreases, the resistance generated by the eddy currents between the permanent magnet cylinder (2) and the conductor cylinder (1) acting on the permanent magnet cylinder (2) also gradually decreases. C2: When the permanent magnet (22) on the permanent magnet cylinder (2) rotates to the groove (11) corresponding to the conductor cylinder (1), the eddy current between the permanent magnet (22) and the groove (11) undergoes a sudden change, so that the resistance acting on the permanent magnet cylinder (2) increases. The direction of the resistance is the first direction. The permanent magnet cylinder (2) transmits the resistance to the cable through the cable reel to form a cable pulling force. The cable pulling force can resist the cable's own weight and prevent the cable from continuing to be released, and make the cable taut.

2. The method of using the magnetic coupler for cable reels as described in claim 1, characterized in that, The pressure block (23) and the permanent magnet (22) are trapezoidal in shape.

3. The method of using the magnetic coupler for cable reels as described in claim 1, characterized in that, The permanent magnet cylinder (2) also includes a permanent magnet end cap (24), which is fixedly connected to the first end face of the permanent magnet retaining ring (21); The permanent magnet retaining ring (21) is provided with a permanent magnet flange (211) on the second end face.

4. The method of using the magnetic coupler for cable reels as described in claim 1, characterized in that, It also includes a plurality of heat sinks (3), which are arranged at intervals along the circumference of the conductor cylinder (1) on the outer circumferential surface of the conductor cylinder (1).

5. The method of using the magnetic coupler for cable reels as described in claim 1, characterized in that, It also includes a retaining ring (4), which is fixedly connected to the first end of the conductor cylinder (1).

6. The method of using the magnetic coupler for cable reels as described in claim 1, characterized in that, A conductor flange (12) is provided at the second end of the conductor cylinder (1).

7. The method of using the magnetic coupler for cable reels as described in claim 1, characterized in that, Also includes: Multiple radial positioning screws (5) are provided, which can extend through the conductor cylinder (1) in the radial direction of the conductor cylinder and press against the outer circumferential surface of the permanent magnet cylinder (2). Multiple axial positioning screws (6) are provided, which can extend through the conductor cylinder (1) in the axial direction of the conductor cylinder and press against the end face of the permanent magnet cylinder (2).

Images